function drawSteel( steel ) {
	var x = steel.x ; 
	var y = steel.y ;
	
	var light = cxt.createLinearGradient(0,0,7,8);
	light.addColorStop(0 , '#eeeeee');
	light.addColorStop(1 , '#aaaaaa');
	var dark  = cxt.createLinearGradient(0,0,8,7);
	dark.addColorStop(0 , "#555555");
	dark.addColorStop(1 , "#333333");
	
	cxt.fillStyle = light;
	cxt.beginPath()
	cxt.moveTo( x   , y   );
	cxt.lineTo( x+15, y   );
	cxt.lineTo( x   , y+15);
	cxt.closePath();
	cxt.fill();
	
	cxt.fillStyle = dark;
	cxt.beginPath();
	cxt.moveTo( x+15, y   );
	cxt.lineTo( x+15, y+15);
	cxt.lineTo( x   , y+15);
	cxt.closePath();
	cxt.fill();
	
	cxt.fillStyle = "#eeeeee";
	cxt.fillRect( x+3, y + 3, 7, 7);
}